Hi. I tried to do a fresh installation on the new disk while keeping the current one on the old disk intact. Installation went smooth through, but it ends with black screen with only mouse pointer on the screen. I waited for about 20 mins butt still no progress

what could went wrong here? Then I decided to hard reset but on the new disk there was no grub and so no possible boot from this disk. Ok then tried to go through entire installation precedure again check everything twice in the paritioning section and again installation ended with black screen and a mouse pointer. So I swithed to my old disk in bios and tried to boot from it, but the X didn't start it ended in cli mode, even entering manually startx didn't help, it replied "no screens found" or smth. like this, but if I select fail safe in grub the X starts ok and I have my kde back. Any ideas what went wrong and why new installation won't complete as it should? I intend to phisicaly remove the old disk after I successfully complete the new installation, so I need it just to copy data from it. The biggest mistery is why the new installation won't complete, grrr

Any suggestion much appreciated, thanks